20-9x=-x2;5,4.

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Solution for 20-9x=-x2;5,4. equation: 



20-9x=-x25.4.

We move all terms to the left:

20-9x-(-x25.4.)=0

We get rid of parentheses

-9x+x25.4.+20=0

We move all terms containing x to the left, all other terms to the right

-9x+x25.4.=-20

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